Title:
ROLLING BEARING UNIT FOR WHEEL
Document Type and Number:
Japanese Patent JP2009012517
Kind Code:
A
Abstract:
To materialize a structure capable of securing connecting strength of both first and second inner wheel members 3, 4 and durability by raising an elastic limit of a part pressed by a caulking part 18 on an outer end surface in the axial direction of an outer diameter side fitting part 12 provided on a first inner wheel member 3 and making it hard to plastic-deform this part.
A heat-treated hardened layer 21 is formed on a surface part of the part pressed by the caulking part on the outer end surface in the axial direction of the outer diameter side fitting part 20.
Inventors:
ISHIKAWA HIROO
Application Number:
JP2007173928A
Publication Date:
January 22, 2009
Filing Date:
July 02, 2007
Export Citation:
Assignee:
NSK LTD
International Classes:
B60B27/00; B60B35/14; B60B35/16; F16C19/18; F16C33/64; F16C35/063
Attorney, Agent or Firm:
Takeo Koyama
Takashi Daejeon
Masaki Muto
Kinzo Koyama
Takashi Daejeon
Masaki Muto
Kinzo Koyama